Here's a music video made with three iPhone 4s in which the person moves the handsets around to complete the picture. It looks pretty dang hard to accomplish, but they were able to pull it off. It's not the first time we've seen something like this. Trapped in an iPhone did the same trick (link). Still, we can't imagine how tough it is to make this work and to do it all in one take must be a nightmare.
What's most interesting about this video is that you can actually create your own version of it. The makers have posted each of the three vids that makes up the complete video. Of course you would need three iDevices. It may be interesting to see what someone can do with some iPads. Even with just one iPad if just to see how out of proportion everything would be.